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This paper first proposes the generalized autoregressive score (GAS) factor X model for predicting Value‐at‐Risk (VaR) and expected shortfall (ES). This model is flexible for adding explanatory variables (X) that are informative for forecasting extreme risks and thus can improve forecast accuracy of the traditional GAS factor model. Then, to investigate whether high‐frequency data of domestic and...
The utilization of carbon dioxide as a building block in organic synthesis has become a highly sought‐after research area. In this minireview, an overview of recent advances on carboxylations using carbon dioxide via visible light photoredox and transition‐metal dual catalysis is given. The merging of these methods provides new avenues to construct carboxylates.
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